CN102684666A - Touch sensing key circuit for induction cooker - Google Patents
Touch sensing key circuit for induction cooker Download PDFInfo
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- CN102684666A CN102684666A CN2012101600808A CN201210160080A CN102684666A CN 102684666 A CN102684666 A CN 102684666A CN 2012101600808 A CN2012101600808 A CN 2012101600808A CN 201210160080 A CN201210160080 A CN 201210160080A CN 102684666 A CN102684666 A CN 102684666A
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Abstract
A touch sensing key circuit for an induction cooker comprises a single chip, a triode Q1 and a key sensing circuit, wherein the PWM (Pulse-Width Modulation) end of the single chip is connected to the base of the triode Q1; the collector of the triode Q1 is connected to a voltage source through a resistor R3, and further connected to the signal input end of the key sensing circuit; and the signal output end of the key sensing circuit is connected to the A/D (Analogue-to-Digital) port of the single chip. The touch sensing key circuit for the induction cooker has the advantages of high antijamming capability, high stability, low cost and the like.
Description
Technical field
The present invention relates to a kind of touch sensible key circuit, be specifically related to a kind of touch sensible key circuit that is used for electromagnetic oven.
Background technology
Electronic switch is one of core of resistance product, and the button indispensable part that is electronic switch.At present, the touch sensible button has become the indispensable part of household appliances product.Press in the key technology at touch sensible; Mainly can be divided into resistive touch button and capacitive induction button at present; Because the touch key-press of resistance-type need paste one in equipment surface and touch resistance film; Its durability is lower, and capacitive sensing have by key technology on nonmetal guidance panel, need not the perforate processing, waterproof is antifouling, is prone to cleaning, no mechanical switch wearing and tearing and the life-span such as grows at advantage.Though the touch-induction-type button has the advantage that traditional mechanical formula button can't be reached, also exist relatively poor being prone to of design cost height, antijamming capability and cause button ineffective or produce shortcoming such as misoperation.
Summary of the invention
Be the problem that overcomes the not enough of prior art and exist, the present invention provides a kind of circuit structure simple, the touch sensible key circuit that antijamming capability is strong, cost is low.
The present invention realizes through following technical scheme: a kind of touch sensible key circuit that is used for electromagnetic oven; Comprise single-chip microcomputer, triode Q1, key induced circuit; The PWM port of said single-chip microcomputer is connected with the base stage of triode Q1; The collector electrode of triode Q1 is connected with voltage source through resistance R 3, and the collector electrode of triode Q1 also is connected with the signal input part of key induced circuit, and the signal output part of described key induced circuit is connected with the A/D port of single-chip microcomputer.Described key induced circuit comprises the touch sensible button, capacitor C 2, resistance R 1, resistance R 2, diode D1, diode D2; Described resistance R 1 is connected in series with resistance R 2; Diode D1 and resistance R 1 are connected in parallel; Diode D2 and resistance R 2 are connected in parallel; And the positive pole of diode D1 is connected with the positive pole of diode D2, and described touch sensible button is connected with the positive pole of diode D1, diode D2, and is connected with resistance R 1, resistance R 2 interconnective ends; One end of the negative pole of diode D1 and resistance R 1 is as the signal input part of key induced circuit; One end of the negative pole of diode D2 and resistance R 2 is as the signal output part of key induced circuit; Described capacitor C 2 one ends are connected other end ground connection with this signal output part.
The present invention and prior art relatively, it is strong to have an antijamming capability, stability is high, low cost and other advantages.
Description of drawings
Fig. 1 is a circuit theory of the present invention.
Embodiment
For the ease of those skilled in the art's understanding, the present invention is described in further detail below in conjunction with accompanying drawing and specific embodiment.
Shown in accompanying drawing 1; A kind of touch sensible key circuit that is used for electromagnetic oven; Comprise single-chip microcomputer, triode Q1, key induced circuit, the PWM port of said single-chip microcomputer is connected with the base stage of triode Q1, and the collector electrode of triode Q1 is connected with voltage source through resistance R 3; And the collector electrode of triode Q1 also is connected with the signal input part of key induced circuit, and the signal output part of described key induced circuit is connected with the A/D port of single-chip microcomputer.
Described key induced circuit comprises the touch sensible button, capacitor C 2, resistance R 1, resistance R 2, diode D1, diode D2; Described resistance R 1 is connected in series with resistance R 2; Diode D1 and resistance R 1 are connected in parallel; Diode D2 and resistance R 2 are connected in parallel; And the positive pole of diode D1 is connected with the positive pole of diode D2, and described touch sensible button is connected with the positive pole of diode D1, diode D2, and is connected with resistance R 1, resistance R 2 interconnective ends; One end of the negative pole of diode D1 and resistance R 1 is as the signal input part of key induced circuit; One end of the negative pole of diode D2 and resistance R 2 is as the signal output part of key induced circuit; Described capacitor C 2 one ends are connected other end ground connection with this signal output part.
The foregoing description is a preferable implementation of the present invention, is not to be to qualification of the present invention, and under the prerequisite that does not break away from inventive concept of the present invention, any conspicuous replacement is all within protection scope of the present invention.
Claims (1)
1. touch sensible key circuit that is used for electromagnetic oven; Comprise single-chip microcomputer, triode Q1, key induced circuit; It is characterized in that: the PWM port of said single-chip microcomputer is connected with the base stage of triode Q1; The collector electrode of triode Q1 is connected with voltage source through resistance R 3, and the collector electrode of triode Q1 also is connected with the signal input part of key induced circuit, and the signal output part of described key induced circuit is connected with the A/D port of single-chip microcomputer; Described key induced circuit comprises the touch sensible button, capacitor C 2, resistance R 1, resistance R 2, diode D1, diode D2; Described resistance R 1 is connected in series with resistance R 2; Diode D1 and resistance R 1 are connected in parallel; Diode D2 and resistance R 2 are connected in parallel; And the positive pole of diode D1 is connected with the positive pole of diode D2, and described touch sensible button is connected with the positive pole of diode D1, diode D2, and is connected with resistance R 1, resistance R 2 interconnective ends; One end of the negative pole of diode D1 and resistance R 1 is as the signal input part of key induced circuit; One end of the negative pole of diode D2 and resistance R 2 is as the signal output part of key induced circuit; Described capacitor C 2 one ends are connected other end ground connection with this signal output part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101600808A CN102684666A (en) | 2012-05-22 | 2012-05-22 | Touch sensing key circuit for induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101600808A CN102684666A (en) | 2012-05-22 | 2012-05-22 | Touch sensing key circuit for induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102684666A true CN102684666A (en) | 2012-09-19 |
Family
ID=46816125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101600808A Pending CN102684666A (en) | 2012-05-22 | 2012-05-22 | Touch sensing key circuit for induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102684666A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106341109A (en) * | 2016-08-31 | 2017-01-18 | 天安电气集团浙江电气有限公司 | Concise rigid touch induction circuit |
| CN107222944A (en) * | 2017-05-04 | 2017-09-29 | 安徽庆睿实业有限责任公司 | The touch induction circuit of electromagnetic oven |
-
2012
- 2012-05-22 CN CN2012101600808A patent/CN102684666A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106341109A (en) * | 2016-08-31 | 2017-01-18 | 天安电气集团浙江电气有限公司 | Concise rigid touch induction circuit |
| CN107222944A (en) * | 2017-05-04 | 2017-09-29 | 安徽庆睿实业有限责任公司 | The touch induction circuit of electromagnetic oven |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |